Exam 3 - Questions Flashcards
(239 cards)
Inhibits microtubule formation in bone cells and prevents neutrophil activation
Colchicine
Can also be used for familial mediterranean fever and recurrent pericarditis (off-label)
Colchicine
Contraindications for colchicine
Strong 3A4 inhibitors
Indinavir, ritonavir, ketoconazole, itraconazole, cobicistat, clarithromycin
ADRs/Warnings for Colchicine
Diarrhea
Throat pain
Blood dyscrasias
Neuromuscular toxicity and rhabdomyolysis
Neuromuscular toxicity and rhabdomyolysis and colchicine
Increased risk in elderly and with renal insufficiency
Dose adjustment for colchicine
Renal insufficiency
Dosing instructions for colchicine
2 tablets at first sign of flare, 1 tablet one hour later
Xanthine oxidase inhibitor –> reduces production of uric acid
Allopurinol
Febuxostat
Chemo patients are at risk of tumor lysis syndrome and hematologic malignancies with what medication?
Allopurinol
Drug interactions with azathioprine, warfarin, theophylline
Allopurinol
May increase theophylline levels
ADRs of allopurinol
Rash –> SJS
Diarrhea, nausea, increased LFTs, acute gout attack
Drug that should be discontinued with first sign of rash
Allopurinol
Strong association with SJS
Dose adjustment for allopurinol
Renal insufficiency
Blocks renal tubular reabsorption of urate. Increases uric acid excretion, decreases serum urate levels
Probenecid
Inhibits PCN secretion, increases PCN levels, can lead to seizure
Probenecid interaction
Probenecid ADRs
Headache, nausea, worsening of gout flare, dizziness, uric acid, kidney stones, blood dyscrasias
Febuxostat has a higher rate of ______ events than with allopurinol
CV
Organ of concern with febuxostat
Liver - hepatic failure reported
Baseline LFTs and monitor during treatment
Pegylated uricase enzyme. Catalyzes oxidation of uric acid to allantoin, which is easily excreted
Pegloticase
Must be given in infusion center due to risk of anaphylaxis and infusion reaction. Patients require premed with antihistamines and corticosteroids
Pegloticase
Pegloticase ADRs
Gout flare, infusion rxn, nausea, ecchymosis, nasopharyngitis, constipation, chest pain, vomiting, CHF exacerbation
Recombinant urate-oxidase. Catalyzes enzyme oxidation of uric acid into allantoin
Rasburicase
Rasburicase ADRs
Anaphylaxis, hemolysis, methemoglobinemia
Indicated for use with an XOI when target uric acid levels are not achieved
Lesinurad